Cam and adjusting device therefor.



k6, 33 v CHARLES DAY qeoaqz E.VWNDELEE z Y24/(A.d%

0. DAY & G. E. WINDBLER.

0AM AND ADJUSTING DEVICE THEREFOR.

APPLIGATION FILED JUNE 13, 1912.

Lw fiww I Patented July 21, 19%

WITNESSES. INVENTORS I ATTORNEY UNITED STATES r PATENT OFFICE.

CHARLES DAY AND GEORGE E. WINDELER, 0F STOCKPOR-T, ENGLAND, ASSIGNORS T0 GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

CAM AND ADJUSTING DEVICE THEREFOR.

Specification of Letters Patent.

Patented July 21, 1914.

Application filed June 13, 1912. Serial No. 703,393.

to change the position of these cams, either angularly or radially or both, to compensate for wear on some part of the engine. For example, it may be necessary on account of the re-surfacing of the fuel valve, or on ac. count of worn gears which drive the cam shaft. In these cases some adjustment-of the cams is necessary if the best results are to be obtained. Furthermore, it is important to so construct and arrange the parts that each cam can be quickly and easily adjusted angularly or radially, as the case may be, by the engineer in charge of the plant, without requiring the services of a man specially skilled in the art. Also the nature of the adjusting means must be such that once the parts are adjusted, there is no danger of their working loose and the cam taking an improper position.

Our invention has for its object to im prove the construction of said cams whereby they may be quickly removed and replaced,

I and also adjusted radially and angularly on their support to meet the requirements of the engine.

For a consideration of what we believe to be novel and our invention, attention is directed to the accompanying specification and claims appended thereto.

In the accompanying drawing, which illustrates one of the embodiments of our invention, Figure 1, is a view in side elevation of or support for a fuel cam of a constant pressure oil engine; Fig. 2 is a section of the cam taken on line 22 of Fig. 1 with the cam in place; Fig. 3 is a sectional View of the support taken on line 3-3 of Fig. 1; Fig. 4 is a view in side elevation of the cam and its support; Fig. 5 is a perspective view of the swivel blocks; Fig. 6 a perspective of a spacer used in adjusting the cam angularly; Fig. 7 shows a cover plate for the blocks and spacers in side elevation and on edge; Fig. 8 is a sectional view of the removable cam; Fig. 9 is a view in side elevation of the cam; Fig. 10 is a perspective view of the cam swivel block, and Fig. 11 a perspective view of a spacer used in adjusting the cam block radially.

12 indicates the cam shaft and mounted thereon'and secured by a key is a hub or cam support 13, the latter having an annular surface 14: and a flange 15, said flange may, if desired, also form a cam that does not require adjustment, and in this manner the number of parts is reduced. The cam proper comprises two principal parts, a ring 16 whose peripheral surface is concentric with the axis of the shaft and a removable cam block 17 whose face is of the proper shape and dimensions to open and close the fuel valve of the engine at the proper time and by the proper amount. The ring 16 is snugly fitted on the annular surface 14 but is capable of being adjusted angularly thereon. It is provided with a peripheral recess having shoulders 18 to engage the ends of the block; also with a cut-away portion or side recess to receive the part 20 of the cam block. Mounted on the support is an axially extending stud bolt 21 that fits into a concentric slot 22 in the ring 16. On the end of the bolt is a washer and clamping nut. The support also carries a stud 23 that is provided with a squared portion 24: which fits into a concentric slot 25 formed in the ring and having curved ends.

It is necessary to accurately position the cam with respect to the fuel valve lever; it is also highly desirable to provide a simple means whereby the cam can readily be set in the first instance or reset thereafter when the conditions of operation require it. To this end the slot 25 has rounded ends formed by drilling out the stock in the blank. The stock between the holes is then cut away leaving a segmental opening. In the ends of the opening are mounted swivel blocks 26, Fig. 5, which are flat on one side and curved to correspond to the end of the opening on the other. The blocks are free to adjust themselves angular-1y. Between the blocks and the squared portion 24 of the stud 23, are located thin fiat plates or shims 27, Fig. 6. These are carefully made of difierent thicknesses so that many adjustments can be obtained by inserting them on one side of the stud or the other. The stud is made yes square where the plates engage it to present a large surface, so that the danger of the parts wearing and permitting lost motion or play is avoided, and to permit of the parts being solidly united. Owing to the use of the self-adjusting swivel blocks in the rounded ends of the groove, the plates or shims can be made of stock of uniform cross section, that is to say, have parallel front and rear faces.

thicker on one side than the other. In other words, segmental in shape which would be relatively costly to make and fit. The blocks and plates constitute metal fillers which are substantially solid and just fit the slot 25 and are confined in place by the cover 30, Fig. 7 The cover is held in place by the stud 23 and its clamping nut. In the ring are spanner holes 31, Fig. 1, by means of which the cam ring can be angularly adjusted when the nuts on the studs are loosed or removed and some of the shims taken out.

Referring now to the cam block, it is best shown in Figs. 4:, 8 and 9. The periphery of the block may be given any desired shape. As shown it has two inclined faces that gradually rise from the periphery of the ring 16 and are connected by a rounded surface 32, said block being hardened to reduce wear. As the cam block moves under the fuel valve lever, said valve is opened and closed. It is sometimes necessary to change the radial position of the cam block due to wear of some engine part, or for some other cause. To this end the block is provided with a flange portion 20 that extends perpendicular to its face. In said portion is a slot 33 having parallel sides, a flat inner end and a curved outer end. In the outer end is mounted a swivel block 34: having a curved surface conforming to the shape of the slot and in the lower end are one or more plates or shims 35, the arrangement being similar to that previously described. The block is held in place by the end shoulders 18, Fig. 1, the side walls 36 formed on the ring which takes the thrust, and the stud bolt 37, Figs. 2 and 4:, which holds it against the fiat face of the ring. This bolt has a squared portion where it passes through the radial slot 33. Obviously by changing the number of shims on one side or the other of the bolt the block as a whole can be adjusted radially in or out. The bolt is provided with a nut having small groove 88 to receive a cotter pin to prevent it from turning. I

It will thus be seen that our improved cam and its adjusting means are simple in theextreme and that the adjustments, no matter how small or large they may be, can be accurately made by a person of ordinary skill. Asa general proposition it may be said that Without this, or an equiva-. lent arrangement, they would have to be the cam block will be adjusted radially when the engine is first fitted up, and that it will be adjusted angularly to compensate for wear of the engine parts at subsequent mes By the constructions outlined it will be observed that all moving parts of the adjustments have a substantially solid metal bearing, thus entirely relieving the securing means of shockswhich tend to loosen them.

In accordance with the provisions of the patent statutes we have set forth what we believe to represent the best embodiment of our invention, but it is to be understood that the drawing is only illustrative and that our invention can be carried out by other means.

What we claim as new and. desire to. se-

cure by Letters Patent of the United States IS I 1. Means for adjusting a cam, consisting of a shaft, a hub fixed thereto, a ring carried by the hub and concentric with the shaft, said ring having slots therein, studs fixed in the hub and passing through the slots, metal fillers between the studs and the ends of the slots, means for holding the fill ers in place, and a cam block carried by the ring.

2. Means for adjusting a cam, consisting of a shaft, a. hub fixed to the shaft a ring carried by the hub and concentric with the shaft, said ring having slots therein, studs fixed in the hub and passing through the slots, metal fillers between the ends of the slots and the studs with means for holding them in place, a cam block, shoulders on the ring between which the cam-block is radially adjustable, a radial slot in the block,

a bolt passing through the slot and seated in the ring, metal fillers in the slot and means for holding them in place; whereby the circumferential and radial adjustment of position of the camv may be effected in such manner that when fixed in position shocks upon the cam are not transmitted to its securing means,as described.

8. In combination, a support, a cam mounted thereon which is provided with a segmental slot, a means that passes through the slot into the support for holding the cam, fiat shims between the means and the ends of the slot, and a swivel block between the shims and one end of said slot.

4. In combination, a support, a cam mounted for angular adjustment thereon which is provided with a segmental round ended slot, a clamping bolt that has fiat surfaces where it passes through the slot,.swivel bloc-ks located in the ends of the slot, and

removable shims located between the blocks and the fiat surfaces of the bolt.

5. In combination, a support, a cam mounted for angular adjustment thereon which is provided with a segmental round ended slot,'a;clamping bolt that passesthrough the slot, swivel blocks located in the ends of 13a the slot, a plurality of thin shims having parallel front and rear surfaces located between the bolt and blocks, and a retaining device for preventing the block and shims from getting out of place.

6. In combination, a ring that is provided with a shouldered recess on its periphery, a cam block mounted in said recess which is provided with a radial slot, a bolt that extends through the slot and has flat faces and a swivel block located in one end of the slot and a shim in the other which embrace the bolt on two sides and hold the block against radial movement.

L. s. [1 s] Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. e 

